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Preparation and purification of four-photon Greenberger–Horne–Zeilinger state
- Source :
- Journal of Physics B: Atomic, Molecular and Optical Physics. 48:055501
- Publication Year :
- 2015
- Publisher :
- IOP Publishing, 2015.
-
Abstract
- We present an efficient scheme for preparing and purifying of four-photon Greenberger-Horne-Zeilinger (GHZ) state based on linear optics and postselection. First, we describe how to create a four-photon GHZ state in both polarization and spatial degrees of freedom from two pairs. Moreover, in the presence of depolarization noise our scheme is capable of purifying the desired state. In the regime of weak nonlinearity we design an indirect photon number-resolving detection to distinguish two states of the two pairs. At last, a fourfold coincidence detector click indicates creating of a polarization-entangled four-photon GHZ state.<br />13pages, 2 figures
- Subjects :
- Physics
Quantum Physics
Photon
FOS: Physical sciences
Condensed Matter Physics
Polarization (waves)
Atomic and Molecular Physics, and Optics
Nonlinear system
Linear optics
Greenberger–Horne–Zeilinger state
Postselection
Quantum mechanics
Quantum Physics (quant-ph)
Coincidence detection in neurobiology
Subjects
Details
- ISSN :
- 13616455 and 09534075
- Volume :
- 48
- Database :
- OpenAIRE
- Journal :
- Journal of Physics B: Atomic, Molecular and Optical Physics
- Accession number :
- edsair.doi.dedup.....390615d5895e731f9da99a62ead55689